1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69d2def6577bda29ca99c27ba714b5763d5ffe16170a45c930d02fb9a0c2250. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c711b3b8-a6e1-4a93-9506-753da88c86f2.json and https://artists.proofprofile.net/proofs/artist/c711b3b8-a6e1-4a93-9506-753da88c86f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Tango I Saved For You (from the film Gaily, Gaily) - Zeb's Remix
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e3aa69241c97f8b7823d4a5fd3b00e24c7ab9ed3c27c3be99ab725a79ee8c4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6DR0701132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c88eeb512a5b0deddd616f7de4773f7d668881373ce8e695bcc9aa3d29de74. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC610100001.
Gran Afro Cuban Orquestra De Generoso Jimenes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f16962cb72ac44b5a057c02a48aff23f360ef5c9f27cdc128348f5d38e93ed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC610100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6977665632c8feaf5877d7fe48bb88ebc1f99b06660038719bf758eda6b6f75. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC610100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46debdc74987f63ac4224ecddc7b2fa412bfbada31d52263d3966295c80749e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC610100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eb5db5fcd62c1bc4512d5e10256a29a54f0e8eec5ce75401f128694174a3b2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC610100010.
Detlef's La Isla Bonita - Noches Cubanas
3 Generations of Cuban Musicians: Live At Barcelona Palau de la Música
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96dccf28311ed8a5e7043391721a2fbc210c3a66f698d8e8200b097819758d79. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE799950090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7bbf555db18caab8f972e98be88f54e8d7203b17bdbb4a4e46537a8cdb1891. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6DR0000599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd7bd34df7d4ef0f8b9a938181df1129cb2e6f98f05b24d3d2412f132eb1847. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6DR0000600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0946b7ce22cbb5c2e5c1d9324efda3183c0e67c2402a7e50bd6c047bd6cbedc7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6DR0000601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71597d15148987b3023230f8541b78ee3ac3d01ce67b777ada5094076074849. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6DR0000602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd330930e9f2591f6c686a4f9220a57c30688ea505e736e3b21c72a69c7d5b570. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6DR0000603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8368cdce0c570355b51c749a147b2e13e9ad8008baefe799e0ba3bcf6dd32f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6DR0000604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6858760af92375e22d9dd202f2476558f6680d34c872dba6c3cd4ec2753fb8c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6DR0000606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3524d0c03a6963af56867bbdc58169c6be339854b74f79113a3fd8c94ae826e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6DR0000609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367d4d4bf2f31e2ad2409e10deb58470e3a7ea4a729c7ababedc9a0072ab3eff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BREMI8000369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea094ff967ff5dd12e3efb3ccb8d778b730da606c9d5955fe2a98e74c117c47. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USF096300820.
Isarel "Cachao" Lopez, Alfredo Valdes, Jr., Alfredito Rodriguez, Chocolate Armenteros, Tata Palau, Patato, Jose Fajardo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6343136a6568e8bd1053a3862528d5659e9373373e795aefffe854ec885e48d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZZR0610021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a9311f395ec2cd80013e7eefeb425253a37ea9043164ebdea4611cf43063e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZZR0610024.
Masters At Work Present Latin Verve Sounds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8763f5e16da0c89da2d5296c6db8f66b18273466f2ea50832159b73119e04d. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USPR36570132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab198f84868966f48782c33f690d8715e21e6770ae41d1da1645b33ecd47e7e1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCKG1700190.
Centenario Roberto Espí: Conjunto Casino, Vol.13